Historical clue formulations

• Capital of Western Australia — 2025-03-23
• Capital city of Western Australia — 2024-07-08
• Capital of Western Australia — 2023-01-02
• Australia's "City of Light" — 2022-04-10
• Capital of Western Australia — 2020-06-09
• State capital on the Indian Ocean — 2017-08-25
• Australia's City of Light — 2016-08-29
• City on the Swan River — 2009-04-19
• Capital of Western Australia — 2005-05-01
• Western Australia's capital — 2004-03-11
• Murdoch University site — 2003-02-15
• Capital of Western Australia — 2002-02-26
• Whence Sir Walter Scott's Fair Maid — 2001-06-28
• City on the Swan — 1999-08-06
• Australian port — 1999-01-03
• City on the Swan river — 1997-08-07
• Capital of Western Australia — 1997-02-21